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Ultra Low Power 32Khz Crystal Oscillator - I have used this circuit many times when I needed a low frequency reference, which did not draw much power. With the components show, the current from a 3v battery is less than 1.2 microamps . . . Hobby Circuit designed by David Johnson P.E.-December, 2004 Ultra Low Voltage Crystal Oscillator using Active Loads - Circuit Ideas for Designers App Note__ Advanced Linear Devices, Inc
Ultra Low Voltage Micropower Crystal Oscillator - Circuit Ideas for Designers App Note__ Advanced Linear Devices, Inc
Use of the CMOS
Unbuffered Inverter in Oscillator - Texas Instrument Application ReportSZZA043 January 2004 __ Designed by Moshiul Haque and Ernest Cox
Very Low Power Gated Crystal Oscillator - The circuit gates the output of a continuously operating 32 KHz crystal oscillator to the input of a C-MOS buffer when clock pulses are needed. The technique gets around the problem of a slow starting crystal oscillator by keeping the oscillator going and switching on a transistor power stage only as needed. . . Circuit by David A. Johnson P.E.-June, 2000
VHF Overtone Crystal Oscillators - VHF overtone crystals can be difficult to use due to the many frequencies at which the crystal is perfectly happy to oscillate. A typical 100 MHz, 5th-overtone crystal will oscillate at approximately 20 MHz, 60 MHz, 100 MHz, and even 140 MHz, not to mention other, unintended modes that such crystals often have. Most VHF overtone oscillators use some sort of tuned circuit or frequency selective filter to select the desired mode and reject the other, equally active modes. The oscillator circuit shown below uses a simple tuned circuit to select the desired mode and is suitable for VHF crystals, including high overtone types __ Contact: Charles Wenzel of Wenzel Associates, Inc.
Wide Swing Variable Crystal Oscillator - amateur radio construction projects. __ Designed by Peter Parker
Wide-swing Variable Crystal Oscillator - Timing and oscillator circuit diagrams / circuit schematics __ Designed by Peter Parker VK3YE
Xtal parameters with spectrum analyzer & tracking generator - Crystal Parameters --- Experiments with a Tracking Generator + Spectrum Analyzer __ Contact Vasily Ivanenko
XTAL switcher using diodes - Ham Radio - Other __ Designed by Guy Roels ON6MU
Xtal Tester - This is a simple Xtal tester circuit. T1 and Xtal have formed an oscillator. C1 and C2 are voltage divider for oscillator. If the Xtal is safe, the oscillator will work well and its output voltage will be rectified by C3, C4, D1 and D2, then T2 will run and LED will light. The circuit is suitable to test 100 KHz - 30MHz Xtal. __ Contact IQ Technologies
XTAL-Controlled FM TX (V6) - My FM Wireless microphone V5 has been very popular, both as a beginners project and as a kit. It is interesting that it has also been the biggest cause of lots of e-mail, the most common question being How can I make it crystal controlled?. The oscillator can be made crystal controlled; replace the 2p7 with a 5th harmonic crystal. The oscillator will then be very stable, so stable in fact, that it cannot even be modulated! This means that you could only use it to send CW (Morse code) __ Designed by Harry Lythall-SM0VPO |
